Alongside a photo of an extensive list of international suicide hotlines, Munn shared lengthy notes on both Instagram and Twitter revealing she'd had "sporadic bouts" with anxiety and depression for "most of [her] adult life," as well as thoughts of suicide on more than one occasion.

"10 years ago I tackled it, learned to fully understand it and haven’t felt the dark depths of depression in about a decade. But before that, thoughts of suicide crossed my mind more than a few times," she wrote. "For those who don’t understand depression, when someone is in that place it’s not because they want to die... it’s because the ongoing, relentless darkness is too painful to endure anymore. You don’t have to suffer from anxiety and depression to feel that low."

However, she closed on an encouraging note, urging her followers to seek help if and when they might need it.

"Please listen to me- from someone who is telling you that she’s been where you are- when I say that SUICIDE IS NOT THE RIGHT CHOICE," she continued. "With suicide, there’s no do-overs. Please try every single option you can before making a choice that cannot be undone."

Teigen, who has been candid about her struggle with postpartum depression following the birth of her first child, Luna, in 2016, also took to Twitter, but admitted a prevention line wouldn't have worked for her. Instead, she credited her husband, John Legend, and doctor for taking notice and reaching out, and encouraged others to do the same for their loved ones.

"In my deepest, darkest post-partum depression, I would have personally never called a phone number, she tweeted. "If John or my doctor never reached out, I would have never even known. It really can be a lonely hole. Watch the people you love and don’t be afraid to speak up."

(She later noted that, "Obviously not everyone is [her] and the hotline is incredibly important.")

If you or someone you know needs help, please call the National Suicide Prevention Lifeline at 1-800-273-TALK (8255) or go to SpeakingOfSuicide.com/resources for a list of additional resources.